Wales is now listed in the country drop down list.
There is a checkbox to specify whether mains gas is available on site. This checkbox is only relevant to the Welsh building regulations.
Summary of the differences between the England 2013 and Wales 2014 regulations:
The BRUKL document has an additional check on the primary energy consumption of the Actual Building. This must not exceed the target primary energy consumption (TPEC) of the of the 2014 Notional Building.
Notional Building Changes:
The U-Value for a window in a side lit, heated and cooled space is 1.8 (W/m2K).
The air permeability for side-lit or unlit spaces for buildings of all sizes is 5 (m3/h m2 envelope area at 50 Pa).
The g-value for top-lit glazing in the notional is 0.52 and the visible light transmittance is 0.57.
If a district heating system is used in the Actual Building then it will also be used in the Notional Building serving the same utility either space heating, hot water or space heating and hot water. Otherwise mains gas (Natural Gas) will be used if it is available on site. If mains gas is not available then Oil is used in the Notional Building.
SCoP is 81.9% for space heating and 86.45% for hot water. Radiant heating top-lit spaces are 86%.
The Notional building is based on lighting with efficacy of 65 luminaire lumens per circuit-watt. The power density curve is now: Power density per 100 lux = (1.79 + 0.007xR + 0.058xR2)/MF
The Notional building has on-site electrical generation equal to the lesser of Equation 8 or Equation 9.
Equation 8: Notional on-site electrical generation = 5.3% x GIA x 120 kWh/m2
Equation 9: Notional on-site electrical generation = 50% x roof area x 120 kWh/m2
TER includes the Notional on-site electrical generation.
TPEC excludes the Notional on-site electrical generation.
Actual Building Changes:
BPEC excludes on site electrical generation with the exception of combined heat and power or tri-generation schemes.
The Cardiff weather file must be used.